Canon EF 70-200 mm f/2.8 L USM Lens (Non Image Stabilised)

Product Information

The Canon EF 70-200mm f/2.8L IS III is the best 70-200mm for Canon users. It’s compatible with their range of DSLR cameras. This is Canon’s third version of this lens. And this is definitely the best one. P is the percentage, V 1 is the first value that the percentage will modify, and V 2 is the result of the percentage operating on V 1. The calculator provided automatically converts the input percentage into a decimal to compute the solution. However, if solving for the percentage, the value returned will be the actual percentage, not its decimal representation. This effectively doubles the already impressive native 0.5x magnification, and is available across the entire zoom range.

In mathematics, a percentage is a number or ratio that represents a fraction of 100. It is one of the ways to represent a dimensionless relationship between two numbers; other methods include ratios, fractions, and decimals. Percentages are often denoted by the symbol "%" written after the number. They can also be denoted by writing "percent" or "pct" after the number. For example, 35% is equivalent to the decimal 0.35, or the fractions . Keep shooting hand held even when light gets low. A fast f/2.8 aperture lets in twice as much light as an f/4 lens, and a 3.5-stop Image Stabilizer guards against camera shake The Sigma measures 8.1 by 3.6 inches (HD), weighs about 2.9 pounds, and uses 77mm front filters. It's about the same size as the internally zooming Sony 70-200mm F2.8 GM II (7.9 by 3.5 inches, 2.3 pounds) and Panasonic Lumix 70-200mm F2.8 S Pro (8.2 by 3.7, 3.5 pounds), but it splits the weight difference. (Credit: Jim Fisher) A key attraction of choosing an f/4 zoom over an f/2.8 is that it’s likely to be more compact and lightweight. That was certainly true of the original Sony lens and the Mark II takes downsizing a step further, shaving 15 per cent off the length and 46g off the weight.

Before we begin, it’s worth noting that despite being a full-frame lens (FE), its release coincided with the Sony A6700, indicating its suitability for APS-C cameras, where it offers an 105-300mm equivalent range. The percentage increase calculator above computes an increase or decrease of a specific percentage of the input number. It basically involves converting a percent into its decimal equivalent, and either subtracting (decrease) or adding (increase) the decimal equivalent from and to 1, respectively. Multiplying the original number by this value will result in either an increase or decrease of the number by the given percent. Refer to the example below for clarification.

You don't have to use DMF, though, and it's easy to toggle via the switch on the left-hand side of the barrel. The expected AF/MF switch is right above it, and the focus limiter sits below. The limiter sets the lens to look for focus across its full range, on subjects 9.8 feet (3m) or further, or for those nearer than 9.8 feet only. In other words, the ratio of 25 males to students in the classroom is equivalent to 50% of students in the classroom being male. Percentage formula The manual focus ring is at the far end of the barrel. It turns smoothly with a little less dampening than I prefer, but it's still adequate for manual focus. The focus motor doesn't lag at all, so I could have been fooled into thinking I was using a mechanical, not electronic, manual focus lens. The lens supports Sony's Direct Manual Focus (DMF) system, which means you can use the ring to override autofocus in any mode. A dust and moisture resistant design, along with versatile controls on this Sony tele-photo lens makes it ideal to use in the most difficult scenarios - both indoors and outdoors. The Sony FE 70-200mm f/4 G OSS is another fantastic option for Sony users. It doesn’t have some of the more advanced features of the previous Sony lens. But this still delivers excellent results.

Performance is absolutely top-drawer. The Mark II lays to rest all of the criticisms we had of the original edition. Sharpness is spectacular with a massive improvement in edge/corner sharpness at both ends of the zoom range. And while the earlier lens gave noticeable lateral chromatic aberration toward the edges and corners of the frame, the Mark II virtually eliminates this altogether. Resistance to ghosting and flare is also very good. Although the percentage formula can be written in different forms, it is essentially an algebraic equation involving three values. The maximum aperture determines how wide the aperture can open. The lower the f-stop, the wider the aperture. That means you get more light into the sensor. And that gives you better low-light performance. This adds a new dimension to the lens, expanding creative possibilities and allowing creators to explore the world of macro photography, while also achieving higher quality results. It’s safe to say image quality is superior to the first generation in every aspect. Picture quality for the Sigma holds up through f/11, drops slightly at f/16 (4,100 lines), and more noticeably declines at the minimum f/22 setting (2,800 lines). Lenses always lose resolution at very small apertures because light particles scatter as they pass through a narrow opening, so pictures look softer. But you might want to use f/16-22 for sunstars, as the lens is capable of crisp 22-point starbursts around small, bright highlights at these settings. Sony a7R IV, 160mm, f/8, 1/250-second, ISO 200 (Credit: Jim Fisher)